#include <B2PrimaryGeneratorAction.hh>

Inheritance diagram for B2PrimaryGeneratorAction:

Public Member Functions
	B2PrimaryGeneratorAction ()

virtual	~B2PrimaryGeneratorAction ()

virtual void	GeneratePrimaries (G4Event *)

G4ParticleGun *	GetParticleGun ()

void	SetRandomFlag (G4bool)

	B2PrimaryGeneratorAction ()

virtual	~B2PrimaryGeneratorAction ()

virtual void	GeneratePrimaries (G4Event *)

G4ParticleGun *	GetParticleGun ()

void	SetRandomFlag (G4bool)

	B2PrimaryGeneratorAction ()

virtual	~B2PrimaryGeneratorAction ()

virtual void	GeneratePrimaries (G4Event *)

G4ParticleGun *	GetParticleGun ()

void	SetRandomFlag (G4bool)

Public Member Functions inherited from G4VUserPrimaryGeneratorAction
	G4VUserPrimaryGeneratorAction ()

virtual	~G4VUserPrimaryGeneratorAction ()

Detailed Description

The primary generator action class with particle gum.

It defines a single particle which hits the Tracker perpendicular to the input face. The type of the particle can be changed via the G4 build-in commands of G4ParticleGun class (see the macros provided with this example).

Definition at line 47 of file basic/B2/B2a/include/B2PrimaryGeneratorAction.hh.

Constructor & Destructor Documentation

B2PrimaryGeneratorAction::B2PrimaryGeneratorAction ( )

Definition at line 46 of file basic/B2/B2a/src/B2PrimaryGeneratorAction.cc.

References G4ParticleTable::FindParticle(), G4ParticleTable::GetParticleTable(), python.hepunit::GeV, G4ParticleGun::SetParticleDefinition(), G4ParticleGun::SetParticleEnergy(), and G4ParticleGun::SetParticleMomentumDirection().

  : G4VUserPrimaryGeneratorAction()
 {
   G4int nofParticles = 1;
   fParticleGun = new G4ParticleGun(nofParticles);
 
   // default particle kinematic
 
   G4ParticleDefinition* particleDefinition 
     = G4ParticleTable::GetParticleTable()->FindParticle("proton");
 
   fParticleGun->SetParticleDefinition(particleDefinition);
   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
   fParticleGun->SetParticleEnergy(3.0*GeV);
 }

B2PrimaryGeneratorAction::~B2PrimaryGeneratorAction ( )

virtual

Definition at line 64 of file basic/B2/B2a/src/B2PrimaryGeneratorAction.cc.

 {
   delete fParticleGun;
 }

B2PrimaryGeneratorAction::B2PrimaryGeneratorAction ( )

virtual B2PrimaryGeneratorAction::~B2PrimaryGeneratorAction ( )

virtual

B2PrimaryGeneratorAction::B2PrimaryGeneratorAction ( )

virtual B2PrimaryGeneratorAction::~B2PrimaryGeneratorAction ( )

virtual

Member Function Documentation

void B2PrimaryGeneratorAction::GeneratePrimaries ( G4Event * anEvent )

virtual

Implements G4VUserPrimaryGeneratorAction.

Definition at line 71 of file basic/B2/B2a/src/B2PrimaryGeneratorAction.cc.

References G4cerr, G4endl, G4ParticleGun::GeneratePrimaryVertex(), G4LogicalVolumeStore::GetInstance(), G4LogicalVolume::GetSolid(), G4LogicalVolumeStore::GetVolume(), G4Box::GetZHalfLength(), and G4VPrimaryGenerator::SetParticlePosition().

 {
   // This function is called at the begining of event
 
   // In order to avoid dependence of PrimaryGeneratorAction
   // on DetectorConstruction class we get world volume
   // from G4LogicalVolumeStore.
 
   G4double worldZHalfLength = 0;
   G4LogicalVolume* worldLV
     = G4LogicalVolumeStore::GetInstance()->GetVolume("World");
   G4Box* worldBox = NULL;
   if ( worldLV ) worldBox = dynamic_cast<G4Box*>(worldLV->GetSolid());
   if ( worldBox ) worldZHalfLength = worldBox->GetZHalfLength();
   else  {
     G4cerr << "World volume of box not found." << G4endl;
     G4cerr << "Perhaps you have changed geometry." << G4endl;
     G4cerr << "The gun will be place in the center." << G4endl;
   }
 
   fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., -worldZHalfLength));
 
   fParticleGun->GeneratePrimaryVertex(anEvent);
 }